This article examines the interactional scaffolding of fetal surgery, an em
ergent medical specialty focused on the unborn patient. Drawing on work in
symbolic interaction, especially that of Mead and Strauss, the article focu
ses on the social organization of work in a Fetal Treatment Unit at an urba
n teaching hospital. The major types of interactions among participants are
cooperation and conflict, illustrating the many differences among actors i
n this social world and their need to work together to successfully build t
heir specialty. Differences discussed in this article center on the work ob
ject in fetal surgery (who is considered the patient!), criteria far patien
t selection, and definitions of disease and treatment Actors must continual
ly negotiate these and other differences as they create the social order of
fetal surgery in a politicized context, both locally at Capital Hospital a
nd for the specialty more generally.